Lightroom CC: so slow on desktop when syncing

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  • Updated 6 months ago
Just done my first large import of about 650 photos (not large by many people's standards) and even though there is plenty of spare capacity in memory and CPU it has ground my computer to a near stop.

Even creating an album and dragging all 650 photos to it, it takes a good 30 seconds to acknowledge the number of photos in the album (presumably just a very quick and simple bit of database info) let alone being able to work on any of the photos.

Just has the feeling that the syncing process is too involved and in the foreground in all local actions. It's like every time I do something it first has to go through syncing before what I did gets acknowledged. Same as with keywording and other functions.
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Simon Wrigley

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Posted 7 months ago

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Rick Spaulding, Champion

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A new version of LrCC was just posted this evening. Give it a try and let us know if it helps.
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Jim Wilde, Champion

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You could try pausing sync before doing the import, resuming when the import has finished.
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Simon Wrigley

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Thanks Rick, just updated so will see if there's any difference.

Good idea Jim, will try next time but still think there is a need for syncing to be more in the background.
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Todd Hitt

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Syncing with the cloud is, for me, way too slow. It seems to clip along at 2 minutes per photo.

Is this an anomaly, bug?, the way it's intended?
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Jim Wilde, Champion

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Uploading or downloading? What's your connection speed - up and down? What size files are being synced? What other network traffic is happening at the time?

Sometimes I've found LRCC to be too aggressive in it's use of my internet connection, wishing for some means of controlling how much bandwidth it's allowed to use.
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Todd Hitt

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Uploading. My files, which are Nikon NEF files, tend to be 20MB.

My upload speed tests out at 4 Megabit/sec. That would be *about* 500 MB /sec. If were using all that bandwidth, it would take 4/100's of a second to upload a 20MB file.
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Jim Wilde, Champion

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I think you've got your maths wrong there. 4Mbps would equate to around 500 KB/s, not MB/s. So that would mean, with all available bandwidth, a 20MB file would take around 40 seconds to upload.
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Todd Hitt

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You are right. Took the 8 bits per byte the wrong way.

Time to look at my Internet upload speed. Thanks.
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Kevin Wright

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I have a similar problem.

My upload bandwidth, as reported on my modem, is 20000kbps (=20mbps = 2.5MB/s)
Yet the upload speed I'm getting is under half that, roughly 24 seconds for a 24MB raw file (=1MB/s)

I have no other concurrent uploads, and the previews have already been uploaded.  So I struggle to believe that the protocol overhead is over 100% for this, and that 1MB/s number to me seems just a little bit too round, the sort of thing that I'd expect if there was some form of intentional throttling going on.

By my calculations, it's going to take a further 2 full days to upload the remainder of the pictures that I'm migrating from Lightroom "classic".  I can just about live with that number, but it's utterly disgusting that I had to manually time the upload speed for a single image and calculate it, Lightroom absolutely can and should already be telling me this fact!

Can we please, PLEASE get some better metrics shown here to help understand what's happening?

I'd like a window that shows the number of images fully synced, the number of images waiting to be synced, the percentage of images fully synced, the current up/down speed (with a history graph), and an estimate of remaining time to upload any outstanding images at current speeds.
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